EP1345718A1 - Method for producing metalstrip by means of a strip casting machine - Google Patents
Method for producing metalstrip by means of a strip casting machineInfo
- Publication number
- EP1345718A1 EP1345718A1 EP01989617A EP01989617A EP1345718A1 EP 1345718 A1 EP1345718 A1 EP 1345718A1 EP 01989617 A EP01989617 A EP 01989617A EP 01989617 A EP01989617 A EP 01989617A EP 1345718 A1 EP1345718 A1 EP 1345718A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- casting
- material layer
- strip
- cast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000007789 gas Substances 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 32
- 239000000919 ceramic Substances 0.000 claims description 8
- 229910010293 ceramic material Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 229910003564 SiAlON Inorganic materials 0.000 claims 1
- 229910052575 non-oxide ceramic Inorganic materials 0.000 claims 1
- 239000011225 non-oxide ceramic Substances 0.000 claims 1
- 229910052574 oxide ceramic Inorganic materials 0.000 claims 1
- 239000011224 oxide ceramic Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011195 cermet Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0651—Casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
Definitions
- the invention relates to a method for operating a belt casting machine, in which metal melt is poured between two rotatable casting rolls, a gas film being formed between the respective casting roll surface and the band skin of the metal melt which forms in the process, in which the gas is in the one located above the metal bath Inerting chamber is introduced.
- the invention further relates to a jacket ring for the casting tube of the strip casting machine.
- BESTATIGUNGSKOPIE ze is prevented and a sufficient thermal conductivity is also intended.
- these depressions however, a corresponding roughness arises on the surface of the cast metal strip.
- each of these casters can be reworked relatively quickly, since the indentations, which can be up to 100 micrometers in size, are reduced by the wear on the surface of the rollers.
- These depressions or textures, in which dirt accumulates relatively quickly, are also often to be cleaned.
- the object of the present invention is to provide a method according to the type mentioned at the outset, by means of which the surface roughness of the metal strip to be cast can be determined, even when using casting rolls with depressions distributed over their surface.
- the object is achieved according to the invention in that a controlled amount of a gas of argon, nitrogen and / or another gas is fed into the inerting chamber during the casting, so that the heat transfer from the band skin to the casting tube is influenced by the resulting film thickness of the gas film can be that the casting roll surface can be provided with or without depressions and a smooth surface of the strip to be cast can be achieved.
- a defined mixture of argon and nitrogen is used as the gas, by means of which the roughness of the surface of the strip to be cast can be adjusted as desired.
- BESTATIGUNGSKOPIE tape and thus greater elongation in the recessed area of the roll surface, with which possible shrinkage cracks can be avoided.
- the surface roughness of the metal strip to be cast can be kept to a minimum by using a defined gas mixture.
- FIG. 1 shows a partial cross section of a strip casting machine for the casting rolls
- FIG. 2 shows a schematic section of an enlarged part of a
- Jacket ring as well as a gas film and a band skin.
- FIG. 1 shows two casting rolls 11, 12, a side seal 16 and an upper end element 14 with sealing strips 13, 17, of a band casting machine 10 used in particular for the production of steel strips.
- a closed inerting chamber 24 is formed above the metal bath formed between the rollers 11, 12 and can be filled with an inert gas via a connecting line 29. Will be beneficial
- BESTATIGUNGSKOPIE a further connection line 31 blows an additional protective gas 32 away from the chamber 24 onto the respective roller surface 11 ', 12' in order to keep the latter free from any oxygen deposition.
- a gas film is formed between the respective casting roller surface 11 ′ and the band skin D of the molten metal 18 that is formed, in which the gas is essentially introduced into the inerting chamber 24 located above the metal bath.
- a controlled amount of a gas G3 of argon, nitrogen and / or a third gas is fed into the inerting chamber 24 during the casting through the connecting line 29, so that the heat transfer from the band skin D3 to the casting tube 11, 12 through the
- the resulting film thickness of the gas film G3 can be influenced in such a way that the casting roller surface 11 ', 12' can be provided with (or without) depressions and a smooth surface of the strip to be cast can be achieved.
- the base material A is provided with an application of an additional material layer C which contains ceramic or cermet particles.
- This ceramic layer C applied to the base material A has depressions 51 in the micrometer range distributed over the entire surface, which can be produced, for example, by sandblasting or laser roughening. These recesses result in an indicated heat transfer ⁇ , which is manifested by a sawtooth curve.
- the majority of the gas G1 is argon, which does not diffuse into the metal to be poured off and accordingly expands in the respective depression due to the heating, so that an indentation in the band skin D1 is of course formed in the micrometer range, the skin being thinner than in the area next to the depression.
- the gas G2 mostly uses nitrogen, which partially diffuses into the metal 18 to be poured off. This results in a bulging of the ligament D2.
- a mixture of argon and nitrogen is used for the gas G3.
- this mixture achieves the ideal state, namely that the band skin D3 is neither indented nor bulged out, and thus a smooth surface is produced in the band to be produced. Due to the controlled amount of the defined mixture of argon and nitrogen, this smooth surface can be achieved with the metal strip without great effort.
- the base material A is made from pure copper, from a copper alloy with the main components Cu, Ag or Cu, Cr, Zr or Cu, Ni, Be (beryllium) or from steel, in particular an alloy steel. It is characterized by the good thermal conductivity, which ensures that the water flowing through a cooling channel in the jacket ring of the GiessroUe dissipates as much thermal energy as possible.
- FIG. 3 shows an enlarged detail of a cylindrical surface which is smooth, which is preferably provided with a surface roughness of less than 6, preferably less than 1 micrometer, and is therefore finished by grinding or turning. It is also a material applied to the base material A
- BESTATIGUNGSKOPIE Layer B is provided, which preferably consists of nickel, steel and / or chrome.
- the material layer B and the material layer C are applied by a thermal spraying process, for example by plasma spraying, flame spraying, by HIP cladding or by another coating method, for example electrolysis.
- the base material A can consist of steel or a steel alloy, however, the material layer B as alloy steel, which is produced by welding, and the material layer C as a thin ceramic application of approximately 0.2 to 0.4 millimeters.
- the material layer C consisting of two different ceramic materials C1, C2 is applied on the material layer B in such a way that the one ceramic material C2 extends over the entire outer surface and the other ceramic material C1 is embedded as particles in the first material C2 at approximately uniform intervals. Adequate protection of the layer B and the base material A is thus achieved and at the same time sufficient thermal conductivity is generated.
- the wear of material layer C is very low due to the choice of materials C1 and C2.
- For the ceramic or cermet layers C1, C2 in particular Al 2 0 3, SiAl 2 0 2, PSZr0 2, Si 3 N 4 SiAION, SiAlYON and / or SiC are usable.
- a metered quantity of a gas of argon, nitrogen and / or a third gas is again fed into the inerting chamber during the casting, so that the heat transfer from the band skin to the casting tube can be influenced by the resulting film thickness of the gas film G so that the Band skin D1 forms a smooth surface.
- the ceramic material C1 embedded in particles at approximately uniform intervals in the first material C2 is
- BESTATIGUNGSKOPIE acts a different heat transfer, which is lower in the area of the particles C1 than in C2, which means that the band skin D2 is reduced in C1.
- a balancing effect is achieved with the gas film G, which is preferably composed of a defined mixture of gases, in order to be able to achieve the desired smooth surface of the strip.
- the cast roller surface 1 1 ', 12' can also have a surface roughness of 6 to 10 micrometers and only be provided with the applied material layer C without post-processing.
- the jacket ring is advantageously coated on the original diameter for further use. This is done by applying a material layer C consisting of ceramic particles or cermet layer after the corresponding wear.
- the invention is sufficiently demonstrated with the exemplary embodiments explained above. However, they are presented in other variants.
- the material layer B and the material layer C consisting of the ceramic particles could be applied simultaneously to the base material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH254100 | 2000-12-30 | ||
CH02541/00A CH692184A5 (en) | 2000-12-30 | 2000-12-30 | Process for operating a strip casting machine comprises introducing a controlled amount of gas during casting into an inerting chamber so that the heat transition from the strip |
PCT/EP2001/015277 WO2002053312A1 (en) | 2000-12-30 | 2001-12-21 | Method for operating a strip casting machine and jacket ring for a casting roll used to carry out said method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1345718A1 true EP1345718A1 (en) | 2003-09-24 |
EP1345718B1 EP1345718B1 (en) | 2006-05-31 |
Family
ID=4569990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01989617A Expired - Lifetime EP1345718B1 (en) | 2000-12-30 | 2001-12-21 | Method for producing metalstrip by means of a strip casting machine |
Country Status (7)
Country | Link |
---|---|
US (1) | US7108047B2 (en) |
EP (1) | EP1345718B1 (en) |
CN (1) | CN1229195C (en) |
AT (1) | ATE327847T1 (en) |
CH (1) | CH692184A5 (en) |
DE (1) | DE50109985D1 (en) |
WO (1) | WO2002053312A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101927324B (en) * | 2009-06-25 | 2013-09-04 | 宝山钢铁股份有限公司 | Method for improving surface quality of casting belt |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005032743A1 (en) * | 2003-10-03 | 2005-04-14 | Novelis Inc. | Surface texturing of casting belts of continuous casting machines |
WO2007129372A1 (en) * | 2006-04-26 | 2007-11-15 | Ihi Corporation | Sealing apparatus for twin-roll casting machine |
CN100434207C (en) * | 2006-07-21 | 2008-11-19 | 江苏兴利来特钢有限公司 | Continuous steel billet casting process and apparatus |
US7806966B2 (en) * | 2007-12-27 | 2010-10-05 | Bose Ranendra K | Nitrogen inerting system for explosion prevention in aircraft fuel tank and oxygenating system for improving combustion efficiency of aerospace rockets/ aircraft engines |
DE102008017432A1 (en) * | 2008-04-03 | 2009-10-08 | Kme Germany Ag & Co. Kg | mold |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5921416A (en) * | 1982-07-26 | 1984-02-03 | Sumitomo Electric Ind Ltd | Tool for plastic work of metal and its manufacture |
US5103895A (en) * | 1989-07-20 | 1992-04-14 | Nippon Steel Corporation | Method and apparatus of continuously casting a metal sheet |
FR2666757B1 (en) * | 1990-09-14 | 1992-12-18 | Usinor Sacilor | SHEET FOR A CONTINUOUS CASTING CYLINDER OF METALS, ESPECIALLY STEEL, BETWEEN CYLINDERS OR ON A CYLINDER. |
AUPM589894A0 (en) * | 1994-05-27 | 1994-06-23 | Bhp Steel (Jla) Pty Limited | Metal strip casting |
EP0773844B1 (en) * | 1994-07-18 | 1998-12-09 | Siemens Aktiengesellschaft | Wear-protection layer for casting rollers |
FR2727338A1 (en) * | 1994-11-30 | 1996-05-31 | Usinor Sacilor | CONTINUOUS CASTING DEVICE BETWEEN INHERENT COVER CYLINDERS |
AUPN176495A0 (en) * | 1995-03-15 | 1995-04-13 | Bhp Steel (Jla) Pty Limited | Casting of metal |
FR2732627B1 (en) * | 1995-04-07 | 1997-04-30 | Usinor Sacilor | METHOD AND DEVICE FOR ADJUSTING THE BOMB OF THE CYLINDERS OF A CASTING SYSTEM OF METAL STRIPS |
WO1998052706A1 (en) * | 1997-05-23 | 1998-11-26 | Voest-Alpine Industrieanlagenbau Gmbh | Casting cylinder for thin-band continuous casting installation |
AT408198B (en) * | 1998-03-25 | 2001-09-25 | Voest Alpine Ind Anlagen | METHOD FOR CONTINUOUSLY CASTING A THIN BELT AND DEVICE FOR IMPLEMENTING THE METHOD |
FR2791286B1 (en) * | 1999-03-26 | 2001-05-04 | Lorraine Laminage | PROCESS FOR PRODUCING CARBON STEEL STRIPS BY CONTINUOUS CASTING BETWEEN TWO CYLINDERS |
US6470550B1 (en) * | 1999-11-11 | 2002-10-29 | Shear Tool, Inc. | Methods of making tooling to be used in high temperature casting and molding |
-
2000
- 2000-12-30 CH CH02541/00A patent/CH692184A5/en not_active IP Right Cessation
-
2001
- 2001-12-21 AT AT01989617T patent/ATE327847T1/en active
- 2001-12-21 DE DE50109985T patent/DE50109985D1/en not_active Expired - Lifetime
- 2001-12-21 US US10/451,964 patent/US7108047B2/en not_active Expired - Fee Related
- 2001-12-21 CN CNB018216013A patent/CN1229195C/en not_active Expired - Fee Related
- 2001-12-21 EP EP01989617A patent/EP1345718B1/en not_active Expired - Lifetime
- 2001-12-21 WO PCT/EP2001/015277 patent/WO2002053312A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO02053312A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101927324B (en) * | 2009-06-25 | 2013-09-04 | 宝山钢铁股份有限公司 | Method for improving surface quality of casting belt |
Also Published As
Publication number | Publication date |
---|---|
CH692184A5 (en) | 2002-03-15 |
US20040045696A1 (en) | 2004-03-11 |
US7108047B2 (en) | 2006-09-19 |
CN1229195C (en) | 2005-11-30 |
DE50109985D1 (en) | 2006-07-06 |
WO2002053312A1 (en) | 2002-07-11 |
EP1345718B1 (en) | 2006-05-31 |
CN1484558A (en) | 2004-03-24 |
ATE327847T1 (en) | 2006-06-15 |
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